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《Journal of Wuhan University(Natural Science Edition)》 2015-01
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Enhanced Photocatalytic Efficiency of TiO_2-SiO_2-Ag Nanocomposites Induced by Localized Surface Plasmonic Effect

XU Jinxia;LI Shan;ZHOU Yuanming;MEI Fei;LIU Lingyun;School of Electrical and Electronic Engineering,Hubei University of Technology;Hubei Collaborative Innovation Center for High-Efficient of Solar Energy,Hubei University of Technology;  
TiO2-SiO2-Ag nanocomposites were fabricated by depositing TiO2 films on SiO2 layer embedded with Ag nanoparticles by means of magnetron sputtering and then subsequent rapid thermal annealing(RTA),and investigated by UV-vis-NIR dual-beam spectrometer,Raman spectrum,scanning electron microscopy(SEM)and the photocatalytic efficiency.The nanocomposites show higher photocatalytic efficiency compared with the pure TiO2 film due to enhancement of light absorption.The enhanced light absorption originated from the near-field enhancement caused by the plasmonic effect of Ag nanoparticles.The enhancement of the photocatalytic efficiency of TiO2 could be adjusted by changing the thickness of the SiO2 protective layer from 0to 20 nm to control the surface plasmonic effect of Ag nanopaticles.
【Fund】: 国家自然科学基金(11305056);; 湖北省自然科学基金(2013CFB028);; 湖北省教育厅科学研究计划(Q20131404)资助项目
【CateGory Index】: O484.41
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